package com.nxj.spring_web_sz.config;

import org.springframework.web.servlet.HandlerInterceptor;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

/**
 * @author 77317
 * @Title: LoginHandlerInterceptor
 * @projectName spring_web_sz
 * @description: 拦截器编写
 * @date 2020/5/16 11:34
 * @Version V1.0
 */
public class LoginHandlerInterceptor  implements HandlerInterceptor {
    //放行方法
    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        //登录成功之后，应该有用户的session
        Object loginUser = request.getSession().getAttribute("loginUser");
        if (loginUser==null){//没有登录
            request.setAttribute("msg","没有权限，请先登录");
            request.getRequestDispatcher("/index.html").forward(request,response);
            return false;
        }
        return true;
    }
}
